Deflector for close coupled oil burners



June 25, 1940. R. F. ANDLER ET AL 2,205,456

nEFLEcToR FOR CLOSE COUPLED on. BURNERS Filed July 20, 1957 2 Sheets-Sheet 1 .QvAQJlL JQ SMQLWEL MA &.-

June 25, 1940. R. F. ANDLER El AL DEFLECTOB FOR CLOSE COUPLED OIL BURNERS Filed July 20, 1957 2 Sheets-Sheet 2 Patented June 25, 1940 t UNITED STATES PATENT'TOFFICE DEFLECTOR 'FOROLOSE COUPLED OIL V BURNERS Robert F. Andler, Rutherford, and Louis W. Schroeder, Passaic, N. J., assignors to Electrol Incorporated, Clifton, N. J., a corporation of Delaware 3 Application July 20, 1937, Serial N o.'154,5 49

Claims. (01. 1581.5)

Our invention relates to the type of oil burner blower fan 2 of standard type and which is arknown to the trade as the ball flame and is esranged to discharge air tangentially into a mempecially intended to meet conditions which the ber l3 which in the trade is called the scroll case. deflector described in our copending application From one side of this scroll case l3 extends a 5 Serial No. 154,548 of even date herewith will not tube 4 which'in the trade is called a blast tube. 5'

take care of. Practice has shown that that de- As in standard practice, an oil pipe which termiflector functions perfectly where the burner has nates in a nozzle 5 is mounted in the blast tube.

a rated capacity of about three gallons per hour, The nozzle 5 is located adjacent the combustion or, as expressed in the trade, 3 G. P. H.; but with chamber (not shown). The foregoing parts bean 8 G. P. H. burner, which requires the proviing of more, or less standard construction are il- 10 vision of about 2%; times as much air to burn lustrated diagrammatically. Our invention, i. e.. the oil, the air stream leaving the fan does not a deflector for use in such an oil burner .is rotate around the scroll case as it will in the shown clearly in perspective Figs. 6 and '7, and in burner described in our said copending applicaposition for use inside the scroll case I3 and ad- 16 tion. Even if a deflector like that disclosed in jacent the discharge port 3 of the fan in the 16-.

the construction of our copending Patent No. other views.

2,197,912, April 23, 1940, were used, although in The deflector I5 is generally wedge-shaped in practice it produced a symmetrical fire, it was form. Its lateral'or'side surfaces (assuming the impractical because it reduced the area so much deflector to be in its proper position in the scroll 20 proper air capacity could not be attained. case, as shown in Figs. 1 and 2), designated as 20 Our invention has for its principal object to 9 and H, are p a Surfaces angularly disposed produce a deflector through the use of which all to each other. The upper surface 8 and lower the foregoing difficulties are overcome and an surface M are cylindrical and extend at right 8 G. P. H. burner can be produced without deangles to surface I I. The radius of surface 8 stroyingin the least the fire symmetry or the is that of the'scroll case l3, while the radius of 25 proper combustion which is essential to a satissurface I4 is greater than that of the blast tube 4. factory oil burner. The several surfaces converge at one end of Our means of accomplishing the foregoing obthe deflectorto form the common point I0, and jects may be more fully comprehended by havsurfaces 8 and II would, if uninterrupted, coning reference to the accompanying drawings, verge on a line at the opposite end; however, 30.

hereunto annexed and made a part of this specithis end is cut away to form a cylindrical surflcation, in which: face I, having a radius equal to that of the dis- Fig. 1 is a front elevation of an oil burner charge opening 3 fromthe fan 2, and two points employing our improved deflector, a portion beor extensions 6 and I2.

ing shown in section; It is to be noted that surface 9 is longer than 35 Fig. 2 is aside elevation of the same; surface II, and that the entire deflector extends. Fig. 3 is a detailed plan View of the scroll case throughout an are less than 180 within the and part of the blast tube, the scroll case being scroll case l3. partly broken away to show the deflector in po-. Thedeflejctor I5 is mounted in the scroll case sition; [3 with its upper surface 8 in contact with the 40 Fig. 4 is a detail view of scroll case and blast inner face of the scroll case, rim and its side tube partly in section showing our deflector in surface If in contact with the inner face of the end elevation; side of the scroll case opposite the blast tube 4,

Fig. 5 is a detail view of the scroll case and as shown in Fig. 3. The, surface 1 is adjusted blast tube showing in dotted lines our deflector to coincide with and form a continuation of the 45 in side elevation; discharge opening 3.

Fig. 6 is a perspective view of the deflector With the deflector l5 so mounted the stream showing the air inlet end; and of air issuing from port 3 is prevented from Fig. 7 is a perspective view of the deflector passing directly into the blast tube 4, and is showing the face for guiding the air stream. forced to take a circular course within the scroll 50 Similar reference numerals refer to similar case l3. Before completing a full circle within parts throughout the entire specification. the scroll case, however, the air stream encoun- In the drawings which show a close coupled ters the surface 9, angularly disposed within the oil burner of standard type, we provide an eleccase, and it's rotation is reduced and its course tric motor I which is directly connected to a deflected into the blast tube 4. 55

By adjusting the angular relationship of the surface 9 to the surfaces 8 and M, the degree of rotation of air within the blast tube 4, and hence the flame characteristics can be closely controlled, and a ball-shaped flame of desired diameter obtained.

It will be appreciated that the term upper is used herein with reference to that portion of the scroll case at which the air stream from the blower enters, and that with installations in positions other than that shown in Figs. 1 and 2, such portion may not in fact be uppermost. The term upper and other corresponding terms as used herein are not, therefore, to be limited to their literal significance, but refer broadly to functional directions with reference to the direction of entry of the air stream into the scroll case which is assumed to be downward.

Having described our invention, what we regard as new and desire to secure by Letters Patent is:

1. In an oil burner having a motor, a blower fan driven thereby and having a discharge port, a scroll case secured to the discharge port of said fan, and a blast tube leading from said scroll case at right angles to the axis of said discharge port; a deflector mounted in the scroll case adjacent the said port, an end portion of said deflector forming an extension of said port, the surface of said deflector adjacent said port coinciding with the curvature of the scroll case, the opposite surface being curved on a radius greater than that of the blast tube, and at least one side of said deflector comprising a plane surface extending from the end portion thereof adjacent the said port to the opposite end of the deflector.

2. In an oil burner having a motor, a blower fan driven thereby and having a discharge port, a scroll case secured to the discharge port of said fan in such manner that the air stream leaving said discharge port enters said scroll case substantially tangentially thereof, and is thus given a rotary motion therein, and a blast v tube leading from said scroll case at right angles to the axis of said dischargeport; a deflector mounted in the scroll case adjacent the said port and having a projection thereon adapted to prevent the air stream from said port passing directly into the blast tube, and a portion extending into said scroll case in the path of the air stream rotating therein to reduce the rotation of the air stream.

3. In an oil burner having a motor, a blower fan driven thereby and having a discharge port, a scroll case secured to the discharge port of said fan in such manner that the air stream leaving said discharge port enters said scroll case substantially tangentially thereof, and is thus given a rotary motion therein, and a blast tube leading from said scroll case at right angles to the axis of said discharge port; a deflector comprising a pair of angularly disposed plane surfaces united by a pair of intersecting cylindrical surfaces extending at right angles to at least one of said plane surfaces, the several surfaces converging at one end of the deflector to a common point, the other end of the deflector being cut away to form a cylindrical surface of radius equal to that of said discharge port; said deflector being mounted in said scroll case adjacent said port with the last named cylindrical surface forming a continuation of said port, and with one plane surface at right angles to said first named cylindrical surfaces in contact with the side of the scroll case opposite the blast tube, whereby the other of said plane surfaces forms a deflecting surface adapted to reduce the rotation of the air stream in said scroll case and direct it toward said blast tube.

4. In an oil burner having a motor, a blower fan driven thereby and having a discharge port, a scroll case secured to the discharge port of said fan in such manner that the air stream leaving said discharge port enters said scroll case substantially tangentially thereof, and is thus given a rotary motion therein, and a blast tube leading from said scroll case at right angles to the axis of said discharge port; a deflector comprising a pair of angularly disposed plane surfaces united by a pair of intersecting cylindrical surfaces extending at right angles to at least one of said plane surfaces, the several surfaces converging at one end of the deflector to a common point, the other end of the deflector being cut away to form a cylindrical surface of radius equal tothat of said discharge port; said deflector being mounted in said scroll case adjacent said port with the last named cylindrical surface forming a continuation of said port and constituting a baflle preventing the air stream from said port passing directly into the blast tube, and with one plane surface at right angles to said first named cylindrical surfaces in contact with the side of the scroll case opposite the blast tube, whereby the other of said plane surfaces forms a deflecting surface adapted to reduce the rotation of the air stream in said scroll case and direct it toward said blast tube.

5. In an oil burner having a motor, a blower fan driven thereby and having a discharge port, a scroll case secured to the discharge port of said fan in such manner that the air stream leaving said discharge port enters said scroll case substantially tangentially thereof, and is thus given a rotary motion therein, and a blast tube leading from said scroll case at right angles to the axis of said discharge port; a deflector having a surface curved on the same radius as that of said discharge port and a plane surface; said deflector being mounted in said scroll case adjacent said port with the curved surface forming a continuation of said port and constituting a bafiie preventing the air stream from said port passing directly into the blast tube, and with the plane surface extending into said scroll case in the path of the air stream rotating therein so as to form a deflecting surface adapted to reduce the rotation of said air stream and direct it toward said blast tube.

ROBERT F. ANDLER. LOUIS W. SCI-IROEDER. 

